| mya | <marine biology> A genus of bivalve mollusks, including the common long, or soft-shelled, clam. Origin: L. Mya a kind of mussel. (19 Mar 1998) |
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| myalgia | <symptom> Pain in a muscle or muscles. (18 Nov 1997) |
| myalgia thermica | Muscle spasms induced by severe exertion in intense heat, accompanied by considerable pain; sometimes related to salt deficiency, hyperventilation, or overindulgence in alcohol. Synonym: myalgia thermica. (05 Mar 2000) |
| myall wood | <botany> A durable, fragrant, and dark-coloured Australian wood, used by the natives for spears. It is obtained from the small tree Acacia homolophylla. Source: Websters Dictionary (01 Mar 1998) |
| myanmar | A republic of southeast asia, northwest of thailand, long familiar as burma. Its capital is yangon, formerly rangoon. Inhabited by people of mongolian stock and probably of tibetan origin, by the 3d century a.d. It was settled by hindus. The modern burmese state was founded in the 18th century but was in conflict with the british during the 19th century. Made a crown colony of great britain in 1937, it was granted independence in 1947. In 1989 it became myanmar. The name comes from myanma, meaning the strong, as applied to the burmese people themselves. (12 Dec 1998) |
| myaria | <marine biology> A division of bivalve mollusks of which the common clam (Mya) is the type. (19 Mar 1998) |
| myasthenia | <anatomy, neurology> Muscular debility, any constitutional anomaly of muscle. Origin: Gr. Astheneia = weakness (18 Nov 1997) |
| myasthenia angiosclerotica | <symptom> A symptom complex characterised by leg pain and weakness brought on by walking, with the disappearance of the symptoms following a brief rest. (12 Dec 1998) |
| myasthenia gravis | <disease, neurology> The characteristic feature of the disease is easy fatigue of certain voluntary muscle groups on repeated use. Muscles of the face or upper trunk are especially likely to be affected. In most and perhaps all cases due to the development of autoantibodies against the acetylcholine receptor in neuromuscular junctions. Immunisation of mice or rats with this receptor protein leads to a disease with the features of myasthenia. (18 Nov 1997) |
| myasthenia gravis and thymoma | <radiology> Of patients with MG 15% have thymoma, of patients with thymoma 50% have MG (12 Dec 1998) |
| myasthenic | Relating to myasthenia. (05 Mar 2000) |
| myasthenic crisis | Severe, life-threatening exacerbation of the manifestations of myasthenia gravis requiring intensive treatment. (05 Mar 2000) |
| myasthenic facies | The facial expression in myasthenia gravis, caused by drooping of the eyelids and corners of the mouth, and weakness of the muscles of the face. (05 Mar 2000) |
| myasthenic reaction | Rapid loss of response to faradic stimulation of a muscle with the galvanic response and the power of voluntary contraction retained. Synonym: myasthenic reaction. (05 Mar 2000) |
| myasthenic syndrome | <syndrome> A condition characterised by muscle weakness that is similar to the symptoms of myasthenia gravis. For this reason, it has been referred to as myasthenic syndrome. This disorder is caused by an insufficient release of neurotransmitter (acetylcholine) by the nerve cells. Unlike myasthenia gravis, as muscle contractions are continued, strength will increase. The cause of Lambert-Eaton syndrome is unknown, but is usually associated with small cell carcinoma of the lung or an autoimmune illness. (27 Sep 1997) |